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Antibacterial microporous PHA preservative film and preparation method thereof

A fresh-keeping film and microporous technology, which is applied in the field of antibacterial microporous PHA fresh-keeping film and its preparation, can solve the problems of non-degradability, environmental pollution, condensation, etc., achieve strong adsorption and permeability, simple preparation process, and breathable good sex effect

Active Publication Date: 2013-12-25
WUJIANG YINGLIDA PLASTIC PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the function of fresh-keeping film is relatively single, and most of the fresh-keeping film does not have antibacterial function, and cannot achieve O 2 and CO 2 Two-way adjustment, easy to condense in the plastic wrap during storage
At the same time, most plastic wraps on the market use vinyl masterbatches as raw materials, which cannot be degraded after being discarded, pollute the environment, and destroy the ecological balance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The preparation method of the modified attapulgite is as follows: the attapulgite is soaked in hydrochloric acid with a mass fraction of 12-14% for 2-3 hours, and then soaked in a solution with a mass fraction of 12-15% sodium hydroxide for 2-3 hours. 3 hours, then washed with deionized water until neutral, and dried to obtain modified attapulgite.

[0017] The preparation method of this antibacterial microporous PHA preservative film, comprises the steps:

[0018] (1) Grinding PHA resin, calcium carbonate and modified attapulgite to 150-200 mesh;

[0019] (2) Put the pulverized PHA resin, calcium carbonate and modified attapulgite in a high-speed mixer, and add acetyl triethyl citrate, antioxidant, n-butyl stearate, titanate The coupling agent and chitosan are mixed evenly to obtain a mixed material;

[0020] (3) Put the mixed material into the extruder to extrude, and then go through calendering, extraction, stretching, cooling, traction and crimping, and finally cu...

Embodiment 1

[0023] An antibacterial microporous PHA preservative film, comprising the following raw materials in parts by weight: 100 parts of PHA resin, 8 parts of acetyl triethyl citrate, 6 parts of calcium carbonate, 8 parts of modified attapulgite, and 264 parts of antioxidant 0.5 parts, 0.5 parts of n-butyl stearate, 1 part of isopropyl titanate triisostearate, and 4 parts of chitosan.

[0024] The preparation method of the modified attapulgite is as follows: the attapulgite is soaked in hydrochloric acid with a mass fraction of 12% for 2 hours, then soaked with a solution of 15% sodium hydroxide for 3 hours, and then deionized water After washing to neutrality and drying, the modified attapulgite can be obtained.

[0025] The preparation method of this antibacterial microporous PHA preservative film, comprises the steps:

[0026] (1) Grinding PHA resin, calcium carbonate and modified attapulgite to 150-200 mesh;

[0027] (2) Put the pulverized PHA resin, calcium carbonate and modi...

Embodiment 2

[0031] An antibacterial microporous PHA fresh-keeping film, comprising the following raw materials in parts by weight: 120 parts of PHA resin, 15 parts of acetyl triethyl citrate, 8 parts of calcium carbonate, 12 parts of modified attapulgite, 264 parts of antioxidant 2 parts, 2 parts of n-butyl stearate, 3 parts of isopropyl titanate triisostearate, 7 parts of chitosan.

[0032] The preparation method of the modified attapulgite is as follows: the attapulgite is soaked in hydrochloric acid with a mass fraction of 14% for 3 hours, then soaked in a solution of 12% sodium hydroxide for 2 hours, and then deionized water After washing to neutrality and drying, the modified attapulgite can be obtained.

[0033] The preparation method of the antibacterial microporous PHA cling film of the present embodiment is the same as that of Example 1.

[0034]

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PUM

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Abstract

Belonging to the technical field of high polymer materials, the invention relates to an antibacterial microporous PHA preservative film and a preparation method thereof. The preservative film comprises the following raw materials by weight: 100-120 parts of PHA resin, 8-15 parts of acetyl triethyl citrate, 6-8 parts of calcium carbonate, 8-12 parts of modified attapulgite, 0.5-2 parts of an antioxidant, 0.5-2 parts of n-butyl stearate, 1-3 parts of a titanate coupling agent, and 4-7 parts of chitosan. The preparation method involved in the invention is simple, and the prepared antibacterial microporous PHA preservative film product has stable structure and good air permeability, is biodegradable, and avoids the pollution of preservative films adopting ethylene masterbatch as the raw material to the environment.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an antibacterial microporous PHA fresh-keeping film and a preparation method thereof. Background technique [0002] Plastic wrap is a kind of plastic packaging product commonly used by people to keep fresh food. Now many families cannot do without them, such as heating food in microwave ovens, storing food in refrigerators, etc. all need plastic wrap. [0003] At present, the function of fresh-keeping film is relatively single, and most of the fresh-keeping film does not have antibacterial function, and cannot achieve O 2 and CO 2 Two-way adjustment, easy to condense in the plastic wrap during storage. At the same time, most plastic wraps on the market use vinyl masterbatches as raw materials, which cannot be degraded after being discarded, polluting the environment and destroying the ecological balance. Therefore, how to overcome the deficiencies of the ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L5/08C08K13/06C08K9/02C08K5/11C08K3/26C08K3/34C08K5/101C08K5/10
Inventor 倪迪
Owner WUJIANG YINGLIDA PLASTIC PACKAGING
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